pdfium fuzzer

testing/libfuzzer/fuzzers/pdfium_fuzzer.cc

Index: testing/libfuzzer/fuzzers/pdfium_fuzzer.cc
diff --git a/testing/libfuzzer/fuzzers/pdfium_fuzzer.cc b/testing/libfuzzer/fuzzers/pdfium_fuzzer.cc
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index 0000000000000000000000000000000000000000..b2f0d1fff0a482f761f8f5021b70d88bc57fa051
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+++ b/testing/libfuzzer/fuzzers/pdfium_fuzzer.cc
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+// Copyright (c) 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// This fuzzer is simplified & cleaned up pdfium/samples/pdfium_test.cc
+
+#include <limits.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <list>
+#include <sstream>
+#include <string>
+#include <utility>
+#include <vector>
+
+#include "third_party/pdfium/public/fpdf_dataavail.h"
+#include "third_party/pdfium/public/fpdf_ext.h"
+#include "third_party/pdfium/public/fpdf_formfill.h"
+#include "third_party/pdfium/public/fpdf_text.h"
+#include "third_party/pdfium/public/fpdfview.h"
+#include "third_party/pdfium/testing/test_support.h"
+
+#include "v8/include/v8.h"
+
+static int ExampleAppAlert(IPDF_JSPLATFORM*, FPDF_WIDESTRING, FPDF_WIDESTRING,
+    int, int) {
+  return 0;
+}
+
+static void ExampleDocGotoPage(IPDF_JSPLATFORM*, int pageNumber) { }
+
+static void ExampleUnsupportedHandler(UNSUPPORT_INFO*, int type) { }
+
+
+FPDF_BOOL Is_Data_Avail(FX_FILEAVAIL* pThis, size_t offset, size_t size) {
+  return true;
+}
+
+static void Add_Segment(FX_DOWNLOADHINTS* pThis, size_t offset, size_t size) { }
+
+static bool RenderPage(const FPDF_DOCUMENT& doc,
+    const FPDF_FORMHANDLE& form,
+    const int page_index) {
+  FPDF_PAGE page = FPDF_LoadPage(doc, page_index);
+  if (!page) {
+    return false;
+  }
+  FPDF_TEXTPAGE text_page = FPDFText_LoadPage(page);
+  FORM_OnAfterLoadPage(page, form);
+  FORM_DoPageAAction(page, form, FPDFPAGE_AACTION_OPEN);
+
+  double scale = 1.0;
+  int width = static_cast<int>(FPDF_GetPageWidth(page) * scale);
+  int height = static_cast<int>(FPDF_GetPageHeight(page) * scale);
+
+  FPDF_BITMAP bitmap = FPDFBitmap_Create(width, height, 0);
+  if (!bitmap) {
+    return false;
+  }
+
+  FPDFBitmap_FillRect(bitmap, 0, 0, width, height, 0xFFFFFFFF);
+  FPDF_RenderPageBitmap(bitmap, page, 0, 0, width, height, 0, 0);
+
+  FPDF_FFLDraw(form, bitmap, page, 0, 0, width, height, 0, 0);
+
+  FPDFBitmap_Destroy(bitmap);
+  FORM_DoPageAAction(page, form, FPDFPAGE_AACTION_CLOSE);
+  FORM_OnBeforeClosePage(page, form);
+  FPDFText_ClosePage(text_page);
+  FPDF_ClosePage(page);
+  return true;
+}
+
+static void RenderPdf(const char* pBuf, size_t len) {
+  IPDF_JSPLATFORM platform_callbacks;
+  memset(&platform_callbacks, '\0', sizeof(platform_callbacks));
+  platform_callbacks.version = 3;
+  platform_callbacks.app_alert = ExampleAppAlert;
+  platform_callbacks.Doc_gotoPage = ExampleDocGotoPage;
+
+  FPDF_FORMFILLINFO form_callbacks;
+  memset(&form_callbacks, '\0', sizeof(form_callbacks));
+  form_callbacks.version = 1;
+  form_callbacks.m_pJsPlatform = &platform_callbacks;
+
+  TestLoader loader(pBuf, len);
+  FPDF_FILEACCESS file_access;
+  memset(&file_access, '\0', sizeof(file_access));
+  file_access.m_FileLen = static_cast<unsigned long>(len);
+  file_access.m_GetBlock = TestLoader::GetBlock;
+  file_access.m_Param = &loader;
+
+  FX_FILEAVAIL file_avail;
+  memset(&file_avail, '\0', sizeof(file_avail));
+  file_avail.version = 1;
+  file_avail.IsDataAvail = Is_Data_Avail;
+
+  FX_DOWNLOADHINTS hints;
+  memset(&hints, '\0', sizeof(hints));
+  hints.version = 1;
+  hints.AddSegment = Add_Segment;
+
+  FPDF_DOCUMENT doc;
+  int nRet = PDF_DATA_NOTAVAIL;
+  bool bIsLinearized = false;
+  FPDF_AVAIL pdf_avail = FPDFAvail_Create(&file_avail, &file_access);
+
+  if (FPDFAvail_IsLinearized(pdf_avail) == PDF_LINEARIZED) {
+    doc = FPDFAvail_GetDocument(pdf_avail, nullptr);
+    if (doc) {
+      while (nRet == PDF_DATA_NOTAVAIL) {
+        nRet = FPDFAvail_IsDocAvail(pdf_avail, &hints);
+      }
+      if (nRet == PDF_DATA_ERROR) {
+        return;
+      }
+      nRet = FPDFAvail_IsFormAvail(pdf_avail, &hints);
+      if (nRet == PDF_FORM_ERROR || nRet == PDF_FORM_NOTAVAIL) {
+        return;
+      }
+      bIsLinearized = true;
+    }
+  } else {
+    doc = FPDF_LoadCustomDocument(&file_access, nullptr);
+  }
+
+  if (!doc) {
+    FPDFAvail_Destroy(pdf_avail);
+    return;
+  }
+
+  (void)FPDF_GetDocPermissions(doc);
+
+  FPDF_FORMHANDLE form = FPDFDOC_InitFormFillEnvironment(doc, &form_callbacks);
+  FPDF_SetFormFieldHighlightColor(form, 0, 0xFFE4DD);
+  FPDF_SetFormFieldHighlightAlpha(form, 100);
+
+  FORM_DoDocumentJSAction(form);
+  FORM_DoDocumentOpenAction(form);
+
+  int page_count = FPDF_GetPageCount(doc);
+
+  for (int i = 0; i < page_count; ++i) {
+    if (bIsLinearized) {
+      nRet = PDF_DATA_NOTAVAIL;
+      while (nRet == PDF_DATA_NOTAVAIL) {
+        nRet = FPDFAvail_IsPageAvail(pdf_avail, i, &hints);
+      }
+      if (nRet == PDF_DATA_ERROR) {
+        return;
+      }
+    }
+    RenderPage(doc, form, i);
+  }
+
+  FORM_DoDocumentAAction(form, FPDFDOC_AACTION_WC);
+  FPDFDOC_ExitFormFillEnvironment(form);
+  FPDF_CloseDocument(doc);
+  FPDFAvail_Destroy(pdf_avail);
+}
+
+static v8::Platform* Init() {
+  v8::Platform* platform;
+  InitializeV8ForPDFium(&platform);
+
+  FPDF_LIBRARY_CONFIG config;
+  config.version = 2;
+  config.m_pUserFontPaths = nullptr;
+  config.m_pIsolate = nullptr;
+  config.m_v8EmbedderSlot = 0;
+
+  FPDF_InitLibraryWithConfig(&config);
+
+  UNSUPPORT_INFO unsuppored_info;
+  memset(&unsuppored_info, '\0', sizeof(unsuppored_info));
+  unsuppored_info.version = 1;
+  unsuppored_info.FSDK_UnSupport_Handler = ExampleUnsupportedHandler;
+
+  FSDK_SetUnSpObjProcessHandler(&unsuppored_info);
+
+  return platform;
+}
+
+static v8::Platform* platform = Init();
+
+extern "C" int LLVMFuzzerTestOneInput(const unsigned char* data, size_t size) {
+  RenderPdf(reinterpret_cast<const char*>(data), size);
+  return 0;
+}